A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion
In this paper, a novel ion-imprinted electrochemical sensor modified with magnetic nanomaterial Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> was established for the high sensitivity and selectivity determination of UO<sub>2</sub><sup>2+</sup>...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/12/4410 |
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| author | Li-Qiong He Zhi-Mei Wang Yu-Jie Li Jing Yang Li-Fu Liao Xi-Lin Xiao Yong Liu |
| author_facet | Li-Qiong He Zhi-Mei Wang Yu-Jie Li Jing Yang Li-Fu Liao Xi-Lin Xiao Yong Liu |
| author_sort | Li-Qiong He |
| collection | DOAJ |
| description | In this paper, a novel ion-imprinted electrochemical sensor modified with magnetic nanomaterial Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> was established for the high sensitivity and selectivity determination of UO<sub>2</sub><sup>2+</sup> in the environment. Density functional theory (DFT) was employed to investigate the interaction between templates and binding ligands to screen out suitable functional binding ligand for the reasonable design of the ion imprinted sensors. The MIIP/MCPE (magnetic ion imprinted membrane/magnetic carbon paste electrode) modified with Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> exhibited a strong response current and high sensitivity toward uranyl ion comparison with the bare carbon paste electrodes. Meanwhile, the MCPE was fabricated simultaneously under the action of strong magnetic adsorption, and the ion imprinted membrane can be adsorbed stably on the electrode surface, handling the problem that the imprinted membrane was easy to fall off during the process of experimental determination and elution. Based on the uranyl ion imprinting network, differential pulse voltammetry (DPV) was adopted for the detection technology to realize the electrochemical reduction of uranyl ions, which improved the selectivity of the sensor. Thereafter, uranyl ions were detected in the linear concentration range of 1.0 × 10<sup>−9</sup> mol L<sup>−1</sup> to 2.0 × 10<sup>−7</sup> mol L<sup>−1</sup>, with the detection and quantification limit of 1.08 × 10<sup>−9</sup> and 3.23 × 10<sup>−10</sup> mol L<sup>−1</sup>, respectively. In addition, the sensor was successfully demonstrated for the determination of uranyl ions in uranium tailings soil samples and water samples with a recovery of 95% to 104%. |
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| id | doaj.art-e1ff472c14534312be6f299fb87e2b26 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-09T22:33:20Z |
| publishDate | 2022-06-01 |
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| series | Sensors |
| spelling | doaj.art-e1ff472c14534312be6f299fb87e2b262023-11-23T18:52:59ZengMDPI AGSensors1424-82202022-06-012212441010.3390/s22124410A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl IonLi-Qiong He0Zhi-Mei Wang1Yu-Jie Li2Jing Yang3Li-Fu Liao4Xi-Lin Xiao5Yong Liu6Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaHengyang Market Supervision Inspection and Testing Center, Hengyang 421001, ChinaSchool of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, ChinaHunan Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaIn this paper, a novel ion-imprinted electrochemical sensor modified with magnetic nanomaterial Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> was established for the high sensitivity and selectivity determination of UO<sub>2</sub><sup>2+</sup> in the environment. Density functional theory (DFT) was employed to investigate the interaction between templates and binding ligands to screen out suitable functional binding ligand for the reasonable design of the ion imprinted sensors. The MIIP/MCPE (magnetic ion imprinted membrane/magnetic carbon paste electrode) modified with Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> exhibited a strong response current and high sensitivity toward uranyl ion comparison with the bare carbon paste electrodes. Meanwhile, the MCPE was fabricated simultaneously under the action of strong magnetic adsorption, and the ion imprinted membrane can be adsorbed stably on the electrode surface, handling the problem that the imprinted membrane was easy to fall off during the process of experimental determination and elution. Based on the uranyl ion imprinting network, differential pulse voltammetry (DPV) was adopted for the detection technology to realize the electrochemical reduction of uranyl ions, which improved the selectivity of the sensor. Thereafter, uranyl ions were detected in the linear concentration range of 1.0 × 10<sup>−9</sup> mol L<sup>−1</sup> to 2.0 × 10<sup>−7</sup> mol L<sup>−1</sup>, with the detection and quantification limit of 1.08 × 10<sup>−9</sup> and 3.23 × 10<sup>−10</sup> mol L<sup>−1</sup>, respectively. In addition, the sensor was successfully demonstrated for the determination of uranyl ions in uranium tailings soil samples and water samples with a recovery of 95% to 104%.https://www.mdpi.com/1424-8220/22/12/4410computational simulationmagnetic ion imprinting membraneuranyl ionselectrochemical sensors |
| spellingShingle | Li-Qiong He Zhi-Mei Wang Yu-Jie Li Jing Yang Li-Fu Liao Xi-Lin Xiao Yong Liu A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion Sensors computational simulation magnetic ion imprinting membrane uranyl ions electrochemical sensors |
| title | A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion |
| title_full | A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion |
| title_fullStr | A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion |
| title_full_unstemmed | A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion |
| title_short | A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion |
| title_sort | novel electrochemical sensor modified with a computer simulative magnetic ion imprinted membrane for identification of uranyl ion |
| topic | computational simulation magnetic ion imprinting membrane uranyl ions electrochemical sensors |
| url | https://www.mdpi.com/1424-8220/22/12/4410 |
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